01 - Whisk together flour and salt in a large bowl. Create a well in the center, add eggs, then gradually whisk in milk and melted butter until smooth. Let rest for 10 minutes.
02 - Heat a nonstick crepe pan over medium heat. Lightly brush with melted butter.
03 - Pour 1/4 cup batter into the pan, swirling to coat bottom evenly. Cook 1-2 minutes until edges lift and bottom is golden. Flip and cook 30 seconds. Transfer to plate and repeat.
04 - Preheat oven to 350°F.
05 - Place ham slices, spinach, and cheese on each crepe. Add a spoonful of crème fraîche and season with pepper.
06 - Fold crepes into quarters or roll up. Arrange in a baking dish. Sprinkle remaining cheese on top.
07 - Bake for 8-10 minutes until cheese melts and crepes are heated through.
08 - Serve hot, garnished with extra spinach or a side salad if desired.